Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Koshkonong, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
417-304 A BASNMO06DS0  142C RYSTEC, INC 522      
417-304 0 BASNMO06DS0  142C RYSTEC, INC 522   2004-12-30   
417-304 1 BASNMOXAXJX  093F ONVOY, LLC - MO 522   2018-11-07   
417-304 2 BASNMOXAXJX  093F ONVOY, LLC - MO 522   2019-12-02   
417-304 3 BASNMOXAXJX  093F ONVOY, LLC - MO 522   2019-12-02   
417-304 4 SPFDMOTLX8Y  073H TELNYX LLC 522   2020-08-01   
417-304 5 BASNMOXAXJX  093F ONVOY, LLC - MO 522   2021-03-05   
417-867 A KSHKMOXARS0  9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-867 1   145J TERRA NOVA TELECOM INC. 522   2025-07-18   
417-867 3 KSHKMOXARS0  9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-867 5 KSHKMOXARS0  9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-867 7 SPFDMODL5MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 522   2014-06-02   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.